Laser-assisted double-wire welding with non-transferred arc (LDNA) is characterized by two converging wires between which an electrical arc burns to melt both wire materials. The molten material falling onto the substrate is spread with oscillating laser radiation to ensure a sufficient bond to the substrate without delamination and pores. The process is characterized by high deposition rates of more than 7.5 kg/h. Due to the high deposition rate, only coarse surface properties in vertical direction in terms of waviness can be produced when creating multilayer additive structures. The approach investigated in this publication examines the potential to produce additive structures with a confined melt pool. The use of water-cooled copper cooling jaws and the deposition of ER70S-6 between these confinements using the LDNA process are being investigated to produce additive 100 mm long structures with significantly improved waviness in the direction of build-up and improved dimensional accuracy. It can be shown that a wall-like structure can be welded between the cooled confinements without material bonding to the copper cooling jaws. Additionally, it has been observed that the confinements can easily be removed which is attributed to the thermal contraction of the steel. Metallographic examinations of the produced structures in the longitudinal and transverse sections as well as hardness curves in the welding direction and in the transverse section are carried out and evaluated. Multilayer structures are produced and the waviness and surface roughness on the side surfaces defined by the jaws are measured and evaluated.